liquid kelp fertiliser comparison - September 2026

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Last updated on 04.09.2026

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Maxicrop Seaweed Plant Growth Stimulant 2.5L for Strong Roots & Growth

Maxicrop

30% off

free shipping

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9,9

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envii SeaFeed Xtra – Organic Seaweed Fertiliser, Liquid Outdoor Plant Food Ideal for all Plants, Lawns, Gardens and House Plants, Rich in Additional Nutrients - 1 Litre Makes up to 500L

envii

free shipping

To the product (3 offers)

9,8

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Bloom City Organic Liquid Kelp Fertilizer - Seaweed Fertilizer for Plants - Concentrated Kelp & Seaweed Extract, Quart (32 oz) Makes 180 Gallons

Bloom City

free shipping

To the product (1 offer)

9,7

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Seaweed and Kelp Fertilizer for Plants - Organic Sea-K - Concentrated Extract Powder Nutrient Makes 700 Liters

Greenleaf Nutrients

free shipping

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9,6

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MULTI-MITE 100% Natural Liquid Seaweed Fertiliser 5 Litre Plant Feed Concentrate Biostimulant for Gardens Lawns Vegetables Trees Roses Shrubs Herbs Fruit and House Plants Natural Liquid Seaweed

Multi-Mite

free shipping

To the product (1 offer)

9,6

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ALGA-SOL Cold Press Concentrate Seaweed Extract Ascophyllum Seaweed Extract 5Ltr Biostimulant Fertiliser Fertilizer Seaweed Plant Feed Organic Fertiliser Fertilizer

Mifica

free shipping

To the product (1 offer)

9,5

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Organic Seaweed Fertiliser, Nutrient-Rich Plant Feed, Liquid Seaweed for Plants, Lawns & Vegetables UK-Made (2.5L)

Oceanic Organic Ltd

free shipping

To the product (1 offer)

9,5

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The Shropshire Seaweed Co. Cold-Pressed Liquid Seaweed Fertilizer - Certified Organic Plant Food & Lawn Feed - Rich in Natural Nutrients for Growth, Roots & Soil Health - Sustainably Sourced, 1L

Shropshire Seaweed

free shipping

To the product (4 offers)

9,5

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Vine Vitality All Purpose Fish & Kelp Liquid Fertilizer Concentrate, 1 Gallon

Vine Vitality

free shipping

To the product (1 offer)

9,4

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Houseplant Focus Concentrated Liquid Fertiliser, 1 Litre - Growth Technology Fertiliser for Indoor Plants - Professional Grade House Plant Food Concentrate with Kelp Seaweed Extract - Makes 200L

Growth Technology Ltd

free shipping

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9,4

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Liquid Kelp Seaweed Fertilizer Concentrate - Blue Planet Nutrients Ascophyllum Nodosum Liquid Seaweed Supplement - Makes 470 Gallons - Quart (32 oz)

Blue Planet Nutrients Liquid Seaweed is an absolute gardening marvel. It is loaded with many major plant nutrients as well as over 60 trace nutrients required by plants.

£ 37.21 free shipping

To the product (1 offer)

Organic Seaweed Liquid Kelp Fertiliser For Gardens, Flowers, Lawns, Shrubs, Organic certification IOFGA (5L)

Emerald Isle Organic Irish Seaweed

£ 41.00 free shipping

To the product (1 offer)

PetraMax Neighbor’s Envy Grass Fertilizer for Lawn & Garden, 1 Gallon Covers up to 16,000 sq.ft. 7-in-1 Liquid Lawn Fertilizer Concentrate for Deep Green Turf - Includes Nitrogen/Iron/Humic/Sea Kelp

PETRAMAX

£ 96.10 free shipping

To the product (1 offer)

Pro-Kleen Organic Liquid Seaweed Fertiliser 5L - Ascophyllum Seaweed Extract for Grass, Vegetables, Fruit, Flowers, Shrubs, Lawns & Trees - Concentrated Formula - Provides up to 500 Treatments

Pro-Kleen

£ 27.95 free shipping

To the product (2 offers)

GARDENNOVA Professional Organic Liquid Kelp Spray for Spider Plant Plants - 8 oz - Ready-to-Use Fully Organic Seaweed & Kelp Fertilizer Mist

GardenNova

£ 11.99 free shipping

To the product (1 offer)

Liquid Seaweed Fertiliser 5L – Organic Plant Food for All Plants, Lawns & Vegetables – Boosts Growth, Stronger Roots & Healthier Plants – Highly Concentrated (Makes Up To 1,000L)

Generic

£ 25.99 free shipping

To the product (1 offer)

Seaweed Fertiliser Premium Liquid (1:200) – Organic Plant Feed for Vegetables, Flowers, Lawns & Shrubs – Sunshine Renewables UK (10L)

Sunshine Renewables UK

£ 37.99 free shipping

To the product (1 offer)

Elixir Gardens Organic Hebridean Liquid Seaweed Fertiliser 5L Bottle | Multi-Purpose Plant Feed Concentrate & Stimulant Lawn & Turf Care/Green-Up Soil Enrichment and Root Booster 5L Bottle

Elixir Gardens

£ 24.25 free shipping

To the product (1 offer)

Organic Seaweed Liquid Kelp Fertiliser For Gardens, Flowers, Lawns, Shrubs, Organic certification IOFGA (10)

emerald isle seaweed

£ 49.00 free shipping

To the product (1 offer)

5% off

Fiddle Leaf Fig Rescue Drops by Fiddle Leaf Fig Plant Resource | 3-in-1 Liquid Fertiliser, Root Supplement & Immunity Booster (100ml - 3.3 Fluid Ounces)

HOUSEPLANT RESOURCE CENTER

£ 18.97 free shipping

To the product (3 offers)

Empathy 1l Grow Your Own Liquid Seaweed Fertiliser

EMPATHY GYO SEAWEED 1LT PK6

£ 9.00

To the product (5 offers)

Tallus Organic Liquid Seaweed Fertiliser Concentrate 1L – Premium Plant Food for Lawns, Flowers, Indoor Plants, Grass Fertiliser, Bio Stimulant

Thallus

£ 13.00 free shipping

To the product (1 offer)

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